Mechanical induced ventilation air-conditioning system for subway platform and ventilation method

A mechanical induced ventilation air-conditioning system for a subway platform comprises a fresh air shaft, an exhaust shaft and a plurality of jet fans, the fresh air shaft is communicated with one end of the air-conditioning system through a pipeline, and the exhaust shaft is communicated with one ends of two sets of smoke exhaust fans in parallel through pipelines. The other ends of the two groups of smoke exhaust fans are respectively communicated with the air exhaust and smoke exhaust air port and the air return port through pipelines, the jet fans are arranged on the upper side of the platform layer of the mechanical station and are distributed in a dot-matrix manner, and the jet fans are used for longitudinal induced ventilation; the other end of the air-conditioning system is communicated with an air-conditioning blast pipe in the platform plate through a pipeline; a plurality of attached air supply outlet devices arranged on the platform plate are communicated with an air conditioner air supply pipe